将 TexStudio 更新到 3.0.1 后，我遇到了问题。当我尝试编译之前已编译过多次的文件时，我收到错误消息：“未找到文件‘l3backend-pdfmode.def’。\begin{document}”。出了什么问题？我的代码是：\documentclass[a4paper,12pt]{article} \begin{document} text \end{document}
.log文件内容：
This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020/W32TeX) (preloaded format=pdflatex 2020.5.21) 6 SEP 2020 19:42
entering extended mode
restricted \write18 enabled.
%&-line parsing enabled.
**document.tex
(./document.tex
LaTeX2e <2020-02-02> patch level 5
L3 programming layer <2020-05-15>
(c:/texlive/2020/texmf-dist/tex/latex/base/article.cls
Document Class: article 2019/12/20 v1.4l Standard LaTeX document class
(c:/texlive/2020/texmf-dist/tex/latex/base/size12.clo
File: size12.clo 2019/12/20 v1.4l Standard LaTeX file (size option)
)
\c@part=\count167
\c@section=\count168
\c@subsection=\count169
\c@subsubsection=\count170
\c@paragraph=\count171
\c@subparagraph=\count172
\c@figure=\count173
\c@table=\count174
\abovecaptionskip=\skip47
\belowcaptionskip=\skip48
\bibindent=\dimen134
)
! LaTeX Error: File `l3backend-pdfmode.def' not found.
Type X to quit or <RETURN> to proceed,
or enter new name. (Default extension: def)
Enter file name:
! Emergency stop.
<read *>
l.2 \begin{document}
^^M
*** (cannot \read from terminal in nonstop modes)
Here is how much of TeX's memory you used:
223 strings out of 480476
2655 string characters out of 5903481
239159 words of memory out of 5000000
16342 multiletter control sequences out of 15000+600000
532636 words of font info for 25 fonts, out of 8000000 for 9000
1141 hyphenation exceptions out of 8191
24i,0n,21p,141b,36s stack positions out of 5000i,500n,10000p,200000b,80000s
! ==> Fatal error occurred, no output PDF file produced!